Lubbicant-expellikrg device



. Dec. 7 1926.

H. J. MURPHY LUBRICANT EXPELLING DEVICE Filed Feb. 11,

Bee. '7, 1926.

i r iTiET @FFECE.

HOWARD J. MURPHY, OF READING, MASSACHUSETTS.

LUBRICANT-EXPELLING DEVICE.

This invention aims to provide an improved high pressurelubricant-expelling device.

In the drawings, which illustrate a prei'erred embodiment of myinvention Figure 1 is a longitudinal section throughalubricant-expelling gun, being partly in elevation;

Fig. 2 is a longitudinal section through the discharge end of the gun,being partly in elevation and showing the relation of the partsthereofwhen lubricant is being expelled to a lubricant-receiving nippleshown in elevation; and

Fig. 3 is a irontend elevation of the lubricant-expelling device.

Referring to the drawings, I have shown a lubricant-expelling gun whichincludes means for expelling lubricant under pressure in substantiallthe same manner and for the same purposes as more fully illustratet anddescribed in my co-pending applfcation Serial No. 8,582, filed herewith,in

which copending application the invention is more broadly claimed.

The drawings show an improved and simplified arrangement of parts withinthe discharge end of the gun. These parts may be assembled anddisassembled very easily and quickly and are arranged so that they areheld together by a single sleeve. The parts are also arranged, asillustrated, so as to withstand the high pressure exerted upon them whenlubricant is being expelled from the nozzle to a lubricant-receivingnipple, as illustrated in Fig. 2.

Referring to Fig. 1, I have shown the usual barrel 1, having a rear head2 into which is threaded a plunger stem 3 carrying the usual plunger 1and handle 5 at the respective ends thereof. At the iront or dischargeend oi the gun, I have shown a reduced end portion 6, formed integralwith the barrel 1 and exteriorly threaded for engagement with theinterior threads of a nozzle sleeve 7.

The coupling part or nozzle sleeve 7 presents interiorly thereof,adjacent its outer end, relatively steep pitched threads 8 forengagement with the threads 9 of a lubricant-receiving nipple 10. Beyondthe threads 8, I have provided a shoulder 11 against which is seated acentering washer 12, which supports a suitable hat-shaped sealing washer13 and also centers and limits the movement of the nozzle of the gunover the lubricant-receiving nipple 10. The coupling threads, nipple,centering washer and hat washer are substantially as shown and morefully described in my co-pending application, Serial No. 616,302, filedFebru ary 1, 1923.

Within the nozzle, I have provided a valve-carrying part let having achamber 15 therein of relatively smaller cross-sectional area than thebarrel 1. This valve-carrying part fits partly within the reduced endportion 6 of the barrel and is provided with a tapered shoulder 16seated against the end of the reduced end portion 6. A hollow valve seatpart 17 fits between the outer end of the valve-carrying part 14 andcentering part 12 and receives the hat washer 13. The part 17 has atapered end portion 19 seated against the end of the valve-carrying part14 and a shouldered end portion holding the base 18 of the sealingwasher 13 be tween it and the centering washer 12.

The valve seat part 17 presents a valve seat 21 against which arelatively large closure valve 22 is seated (Fig. 1) to prevent passageof lubricant out of the nozzle except when the closure valve isdisplaced by the end of the nipple.

At the inner end of the valve-carrying part 14, I have provided a ballcheck valve 23 and between both valves is a spring 24 normally closingthem. The valve seat part 17 is a relatively small part and, when wornto an extent that the closure valve does not prevent leakage, it may beeasily and inexpensively replaced, whereas the valve seat part shown inmy first-mentioned copending application filed herewith, would be a moreexpensive replacement part and could not be as easily and quicklyreplaced.

Heretofore some trouble has been experienced in holding the hat-washersealing part in place. If the parts that hold the sealin washer aredrawn together too tightly, the base portion 18 is apt to be severedfrom the rest of the washer. To remedy this, I have provided a shoulder25 at the outer end of the valve seat part against which the base of thewasher rests and a relatively thin annular flange portion 26 whichsurrounds the peripher of the base portion 18 and seats against t ecentering washer 12 i oration, may

and

to limit the amount wiich the base of he washer may be conn ssed. Thusthe base 18 of the sealing w ier 13 can never be squeezed enough 101 itto be cut away from the remainder thereof.

In assembling the nozzle of the gun with the barrel, the c-' washer 12,sealing washer 13, the valve seat part 17, the valves and 23 andvalve-carrying part 1%: are assembled within the nozzle sleeve 7. Theend of the valvecarrying part is then in serted within the reduced endportion 6 of the barrel 1 and the sleeve is screwed over the end portionuntil the p rts are gripped tigl'itly between the end of the reduced endportion 6 and the shoulder 11. The tapered shoulders and 19 provideE-EQillS between the parts of" the nozzle to prevent 'hiloricant from'le lrin past the parts where they seat against each other.

Strain upon the parts off the nozzle, due to the pressure of thelubricant, exerted inainly span the threats between the slee e 7 and thereduced end 3 t the barrel 1. As there a relauiv 1y large area ofengage-- nient the threads on these parts, there can be no greatdai'igcr of lestroying the nozzle or any parts thereof, by pressure ofthe lubricant. V

Lubricant may be or killed from the chamber 15' to thelubricant-receiving nipple 10 under a relatively high potential pressureor low potential pressure in the same manner as fully described in myfirst-mentioned co-pending application filed herewith.

"While I have shown and described a pre ferred en'ibodiinent of myinvention, it will be understood that changes involving omission,alteration, substitution and reversal of parts, and even changes in themode 01" opbe made without departing from the scope of my invention,which is best defined in the appended claims.

Claims? 1. A lubricant-expelling device including a barrel having areduced end portion fornicd integral with said barrel, a valve ciarrying partliaving a shoulder abutting the end of said aced portion, avalve seat part abutting the end of said valvecarrying part, a valve orsaid valve-carrying part coacting with the salve seat for said valve 1seat part, a sealing washer and a metal washer beyond said valve partand a coupling part presenting a sleeve secured to the edu ced e 'd p'oon of said barrel for lol'l' all of said parts in assembled leist I; v.h said. barrel, I

2. A;lubricant enp elling device including a barrel having a reduced endportion fdrmeid integral with said barrel, a nozzle sleevejtln adeoysecured to said reduced end portion, c ing an adjacent the ofsaidsleeve, a shoulder presented by said sleeve inwardly of said couplingmeans;

washer, a valve seat part and a valve-carrying part all. held inassembled relation with said barrel, between the end of said reducedportion and said shoulder, by said nozzle sleeve, and a valve for saidvalve-carrying part coacting with said valve seat.

A lubricant-expelling device including a barrel having a reduced endportion formed integral with said barrel, a valvecarrying part having atapered shoulder seated against the end ol said reduced portion, a valveseat part having a tapered shoulder seated against the end of said valvecarrying part, a valve for said valve-carrying part coacting with. saidvalve seat, and a nozzle sleeve secured to said reduced end portion andholding said tapered shoulders ti htly against their seats to provideseals a ainst escape of lubricant between darts.

l. A lubricant-expelling device including a nozzle having a nozzlesleeve presenting a metal washer, a flexible seali coupling means at theouter end thereof for V engage :rent with a ltllJTlCittlt-I'QCGlVlDgnipple, means forming a shoulder on said sleeve inwardly of saidcoupling means, a flexible hat washer for engagement with thelubricant-receiving nipple to provide a ight seal between the nipple andsaid nozzle, a valve seat part presenting a recessed end having ashoulder squeezed against the base of said hat washer for holding thelatter in place, said recessed end of said valve seat part providingmeans to prevent said valve seat 1 art llOlll severing the base of saidhat washer from the remainder thereof when squeezed there-against, and avalve coacting with said valve seat part.

5. i; lubricant-e xpelling device including a nozzle having a nozzlesleeve presenting coupling means at the outer eid thereof; a centeringpart, a flexible sealing a valve seat part within said sl of saidcoupling means; said sealing w c presenting a flat base portion heldbetween said centering part and the outer end of said val seat part,means presented at the outer end of saio. valve it part to pr "entcutting oil? tie base portion of said iv v he V sq..e d between theeni'l of said va' part and u cent ""ng and enacting i th said. valveseatpart,

l Rant-expelling device l a having a 110.2 coup" g means at the o a a; ut said sealing washer pree portion held betv d 7 -t and the outerondofsc seat pv an annular nzrt'surron the peri ery of the base of saidso; Washer to li a;

:t the amount which the base of said sealing part may be compressedbetween said centering part and the end of said valve seat part.

7. i-L high pressure lubricant-expelling device comprising, incombination, a barrel presenting a reduced end portion, means forexpelling lubricant from said barrel, a valve carrying part partlylocated within the reduced end portion of said barrel, a valve seat partseated against the end of said valve carrying part, a coupling sleevesecured to the reduced end of said barrel for holding said valve seatpart and said valve carrying partin assembled relation with said barrel,a relatively large closure valve seated against said valve seat partadjacent the outor end of said valve carrying part, a check valvelocated at the inner end of said valve carrying part, a springinterposed between said valves, and means forming a chamber be ween theseats for said valves, from which lubricant may be expelled under arelatively higher pressure than the lubricant may be expell d from saidbarrel.

8. A high pressure lu ricant-expelling d,- vice comprising, incombination, a barrel liesenting a reduced end portion, means forexpelling lubricant from said barrel, a valve carrying part partlylocated within the reduced end portion or" said barrel, a valve seatpart seated against the end of said valve carrying part, a couplingsleeve secured to the reduced end of said barrel and holding said valveseatpart and said valve carrying part in assembled relation with saidbarrel, a chamber within said valve carrying part having a relativelysmaller cross-sectional area than said barrel, a check valve locatedbetween said chamber and said barrel to permit flow of lubricant onlyfrom said barrel to said chamber, and a closure valve and meansassociated therewith for holding the same normally seated against saidvalve seat part adapted to be opened by the end of a lubricant receivingnipple to permit passage of lubricant from said chamber to the nipple.

9. A high pressure lubricant expelling device comprising, incombination, a barrel presenting a reduced end portion, means forexpelling lubricant from said barrel, a valve carrying part partlylocated within the reduced endL portion of said barrel, a valve seatpart seated against the end of said valve carrying part, a couplingsleeve s cured to the reduced end of said barrel and holding said valveseat part and said valve carrying part in assembled relation with saidbarrel, a chamber within said valve carrying parthaving a relativelysmaller cross-sectional area than said barrel, a check valve locatedbetween said chamher and said barrel to permit flow of lubricant onlyfrom said barrel to said chamber, a closure valve and means associatedtherepotential pressure, and sealing means ca' with for holding the samenormally seated against said valve seat part adapted to be opened by theend of a lubricant-receiv' nipple to permit the nipple to force cantfrom said chamber at a relatively hi ried by said sleeve effective toseal d oint between said sleeve and nipple prior to opening of saidvalve.

10. A lubricant-expelling gun having a barrel provided with manual ioperated tasplacement means for iorc' 1g lubricant therefrom, a couplingmeans 1' ronnecting said barrel to a nipple, conduit means connectingsaid barrel and coupling means, spaced valve seats for said conduitmeans, valves for said seats, and a single spring for ur ing said valvestoward their seats, one e permitting flow of lubricant only from saidbarrel toward said coupling means and the other being opened by thenipple when operatively engaged by said coupling means.

11. A lubricant-expellin gun having a barrel provided with manuallyoperated dis-- placement means -tor forcing lubricanttherefrom, acoupling means for connecting said barrel to a nipple, conduit meansconnecting said barrel and coupling means, spaced valve seats for saidconduit means, valves for said seats, and a single spring for urgingsaid valves toward their seats, one valve permitting fiow o1 lubricantonly from said barrel toward said coupling means and the other beingopened by the nipple when operatively engaged by said 7 coupling means,and sealing means for the joint between said coupling means and nipple,said sealing means effective to seal said joint prior to opening or saidvalve by the nipple.

12. A lubricant-expelling gun having a barrel provided with manuallyoperated displacement means for forcing lubricant "from said barrel, acup shaped member the bottom wall of which is perforated to receive thelubricant expelled from said barrel, a part having a perforation closingthe opposite end of said member, a pair of valves in said member, aspring engaging said valves for urging them to seat respectively on saidbottom wall and on said part for normally closing the perforations insaid bottom wall and part, a coupling for connection to a nipple, saidnipple when operatively engaged by said coupling opening said valvenormally seated. on said. part.

13. A lubricant-expelling gun having a barrel provided with manuallyoperated displacement mean for forcing lubricant from said barrel, meansforming a chamber having a port at one end for receiving the lubricantexpelled from said barrel and a port at the opposite end for exit or"lubricant from said chamber, means torming valve at associated. ith saiports, a pair of gnu i 1 said chamber, a single compresn spring engagingsaid valves and urging rlieni toward said for normally closing; saidports, a coupling means forwardly 0% said chamber for connection to anipple, said nipple when operatively engaged by said coupling meansopening the valve n01- inally closing; the exit port of Sfllfl chamber.

14. A lubricant-expelling gun having Jamel pi'ovielecl with manuallyoperated displacement means for forcing lubricant from said barrel,means forming a ClELlE'llJlJ having at opposite ends a valve controlledinlet port for receiving the lubricant eX- pellecl from said barrel anda valve controlled exit port for the lubricant expelled from saidchamber, relatively movable valves for saicl ports, a Sll 9,.l6compression spring in said chamber urging said valves 1 rel closedposition, coupling means forwardly of said clian'zlics For connection toa nipple, said nipple when queraiively received by saicl coupling);means positively opening the valve controlling said exit port.

In testimony whereof, I have signed my name to this specification.

HOVIARD J. MURPHY

